How to get parents to let me stay up later?

Hi, I am currently on summer vacation from school and I STILL have a bedtime. Every single night on weekends and even SUMMER TIME I have to strictly be in bed at 11:00. Its just not even fair. I can sleep in however late on want to in the mornings, and I barely make any noise either. So, How do I convince them that my 15 YEAR OLD BROTHER and I should be able to stay up past the time of 11:00? Please don't say that because they are the adults they get to dictate over me- I get it. So please answer, and possibly state what time your parents expect you to be in bed